a solo or communal activity whereby a hardcore sunbather forgoes the comfort of a sunlounger or towel and stands in a zombie like trance to achieve the best possible tan. usually with legs apart, hands on hips or reading a book. to achieve the stantanning status 8 hours or more is required.

christ have you seen that guy over there?
yeah he is stantanning.
how long has he been like that?
about 9 hours now